Use VLOOKUP to merge Excel files

http://answers.yahoo.com/question/index?qid=20060922225016AAZ7IaE
http://www.mrexcel.com/forum/showthread.php?t=82540
http://www.techonthenet.com/excel/formulas/vlookup.php
http://www.ehow.com/how_2169371_two-excel-files-using-vlookup.html